# Copyright 2016 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Utilities for loading op libraries.

@@load_op_library
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import os

from tensorflow.python.framework import load_library
from tensorflow.python.platform import resource_loader


def load_op_library(path):
  """Loads a contrib op library from the given path.

  NOTE(mrry): On Windows, we currently assume that contrib op
  libraries are statically linked into the main TensorFlow Python
  extension DLL.

  Args:
    path: An absolute path to a shared object file.

  Returns:
    A Python module containing the Python wrappers for Ops defined in the
    plugin.
  """
  if os.name != 'nt':
    path = resource_loader.get_path_to_datafile(path)
    ret = load_library.load_op_library(path)
    assert ret, 'Could not load %s' % path
    return ret
  else:
    # NOTE(mrry):
    return None
